I think Epik Subs would be fine for music. The few reviews I have read of the conquest said it was superb for music as well as movies. One negative review does not mean they are all terrible. There might be a few subs which are somewhat quicker, but I will bet that Epik's subs beat most subwoofers in their price class for music as well as movies.
For one grand, one of the highest choices on my list would be the
Rythmik F15, that would hard for movies and be extremely clean and quick for music. $1k will also get you two
ED A5s-300 subs, including shipping. Or two
A3-300's. Any of those would make for a terrific system for either movies or music. There is also the
Hsu VTF3 mk3, which is a great for both sound quality and thunderous SPL.